Abstract: The present invention is directed to a modular unit for the distribution of the light flow of a cold light source which makes it possible to combine different illumination methods in mixed-light operation with only one individual high-power cold light source and to switch between illumination methods. In the modular unit according to the invention for the distribution of the light flow of a cold light source, the light flows of a cold light source which are distributed to a plurality of cross sections can be manipulated individually, and elements provided for the manipulation of the light are constructed in such a way that an adaptation possibility for different types of light guides is provided at the output of each individual cross section. Any combinations of optical elements for beam shaping, beam splitting and/or beam guiding can be used to distribute the light flow.

Abstract: The invention is directed to an arrangement for manual adjustment of a focus position in microscopes with a motor-operated focusing drive. According to the invention, the arrangement has a first operator's control for giving an adjusting path length and a second operator's control for giving an adjusting speed. The two operator's controls are preferably constructed as rotating knobs. An adjusting path length for the focusing movement is given by the rotational angle at the first rotating knob, and an adjusting speed of the focusing movement is given by the rotational angle at the second rotating knob. The change in the rotational angle at the first rotating knob is proportional to the change in the adjusting path and the change in the rotational angle at the second rotating knob is proportional to the change in the adjusting speed.

Abstract: The invention is directed to a stereo microscope with electrically controllable components which is characterized in that it is highly user-friendly and ergonomic. For this purpose, all essential components are provided with an electric control or status detection and are interconnected by a network. A common all-purpose operator console is advantageously provided.

Abstract: The invention is directed to a microscope camera which is suitable particularly for recording digital images in stereomicroscopy. The complete camera, including a deflecting element for one of the stereo beam paths, image recording chip, control unit and processing unit, monitor and data interfaces, is integrated in an intermediate tube.

Abstract: The invention is directed to an observation device in which a user observes objects or process flows and influences the display of the object or the flow of the process by entering operating commands and control demands. The observation device is outfitted with an operating unit which is spatially separable with respect to the rest of the components of the observation device. According to the invention, a device for displaying and presetting adjustment values relating to the device parameters and/or a device for displaying images of the object or process flow to be observed are provided at the operating unit.

Abstract: The invention is directed to a stereo microscope which is suitable particularly for observing fluorescence with incident light. Particularly advantageous fluorescence excitation is achieved when the illumination beam path has a zoom system by which an illumination is achieved that is adapted to the zoom factor of the observation beam path.

Abstract: The invention is directed to an arrangement for the focusing of microscopes, preferably for stereo microscopes, with a drive unit for the focusing movement in the Z-coordinate direction and with elements for monitoring the focusing on a plurality of different positions z1, z2 . . . zn located within an observed object on coordinate Z. A path measuring system is provided for determining the adjusting path ?z during a change in the focus from a first selected position z1 to a second selected position z2. Further, there is a display device that is coupled with the path measuring system for displaying the selected positions z1, z2 and/or for displaying a measurement for the adjusting path ?z. According to the invention, the objective assessment of focus which is made possible in this way is used to increase accuracy in depth measurements.

Abstract: The invention is directed to an arrangement for manual adjustment of a focus position in microscopes with a motor-operated focusing drive. According to the invention, the arrangement has a first operator's control for giving an adjusting path length and a second operator's control for giving an adjusting speed. The two operator's controls are preferably constructed as rotating knobs. An adjusting path length for the focusing movement is given by the rotational angle at the first rotating knob, and an adjusting speed of the focusing movement is given by the rotational angle at the second rotating knob. The change in the rotational angle at the first rotating knob is proportional to the change in the adjusting path and the change in the rotational angle at the second rotating knob is proportional to the change in the adjusting speed.

Abstract: A method for the acceleration of the adjusting movement in a positioning system in which at least one stepping motor is controlled at a variable control frequency f, the adjusting speed is dependent upon the control frequency f, and a positioning step of the adjusting movement is initiated at every period of the control frequency f.

Abstract: A method for the synchronized control of a plurality of stepping motors SM1, SM2 . . . SMn which serve as drives in a feed system, wherein the stepping motors SM1, SM2 . . . SMn are controlled with a base frequency fa and a cycle of the base frequency fa is proportional to a given step length SL. Different step lengths SL1, SL2 . . . SLn are triggered fith each cycle of the same base frequency fa in the individual stepping motors SM1, SM2. . . SMn, wherein a specific step length SL1 is associated with stepping motor SM1, a specific step length SL2 is associated with stepping motor SM2, and so forth. Accordingly, it is no longer required to provide separate control frequencies for every stepping motor. All stepping motors can now be controlled at the same frequency and only a counter unit or timer unit is required for all stepping motors of the positioning system.

Abstract: The invention is directed to a method for the acceleration of the adjusting movement in a positioning system in which at least one stepping motor is controlled at a variable control frequency f, the adjusting speed is dependent upon the control frequency f, and a positioning step of the adjusting movement is initiated at every period of the control frequency f.

Abstract: An optical observation instrument, particularly a microscope, is outfitted with at least one eyepiece in which a device for displaying information in a visually perceptible manner is arranged in the intermediate image plane. In this way, added information is effectively introduced into the observation beam path with low expenditure on instrumentation because, in contrast to the prior art, no splitter mirrors or the like optical components are required. Further, this prevents unnecessary attenuation of the intensity of the observed image due to additional splitter mirrors or the like.

Abstract: The invention is directed to a method for the synchronized control of a plurality of stepping motors SM1, SM2 . . . SMn which serve as drives in a feed system, wherein the stepping motors SM1, SM2. . . SMn are controlled with a base frequency fa and a cycle of the base frequency fa is proportional to a given step length SL.

Abstract: A sewing installation for the production of a lined pocket opening on a workpiece comprises a stand on which a working plate is supported. A cutting device for the production of corner cuts in the workpiece is disposed underneath the working plate. This cutting device is held on a support which lodges in the stand pivotally about an axis so that the cutting device can be moved into a position in which it is free from the working plate.

Abstract: A sewing installation for the production of a piped pocket opening in a cloth workpiece comprises two cutting units each with a corner cutting knife, which have two knives each. For the production of straight or diagonal corner cuts, one knife of a corner cutting knife is displaceable and adjustable in the direction of the incision which substantially constitutes the pocket opening.

Abstract: A sewing machine having a machine arm, a rest for the material being sewn and a device for producing buttonholes, which comprises a cutting knife and a plurality of cutting blocks of respectively different lengths which are arranged on a common carrier. The buttonhole device is acted upon by an actuating device that can be moved from an upper position into a lower position, the cutting knife is arranged in a stationary manner underneath the sewing material, and the cutting block is lowered by the actuating device onto the cutting knife.

Abstract: An automatic sewing apparatus comprises a workpiece holder which is designed for manipulation of a pocket flap. It comprises a flap clamp and a transfer clamp and a clamp. During the sewing of a first flap seam, the flap is held by the flap clamp and the clamp. In this case, the transfer clamp is positioned under the flap. Then the flap clamp is released and the clamp is disengaged and simultaneously the transfer clamp is displaced such that on the one hand the flap is folded down over the first flap seam and is simultaneously held in vicinity to the second flap seam to be produced.